20701984 has 12 divisors (see below), whose sum is σ = 40757094. Its totient is φ = 10350976.

The previous prime is 20701973. The next prime is 20701987. The reversal of 20701984 is 48910702.

It can be written as a sum of positive squares in only one way, i.e., 19114384 + 1587600 = 4372^2 + 1260^2 .

It is not an unprimeable number, because it can be changed into a prime (20701987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323437 + ... + 323500.

Almost surely, 2^20701984 is an apocalyptic number.

It is an amenable number.

20701984 is a deficient number, since it is larger than the sum of its proper divisors (20055110).

20701984 is an equidigital number, since it uses as much as digits as its factorization.

20701984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646947 (or 646939 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 20701984 is about 4549.9432963500. The cubic root of 20701984 is about 274.5811099136.

The spelling of 20701984 in words is "twenty million, seven hundred one thousand, nine hundred eighty-four".